.f {
    position: relative;
    margin: 300px;

    .s {
        position        : absolute;
        width           : 10em;
        height          : 10em;
        transform-origin: center center;
        border-radius   : 100%;
        background-color: #f00;
        @for $i from 1 through{
            &:nth-child(#{$i}){
                transform: translate(100px) rotate($i*60deg);
            }
        }
    }
}